Physics · Illumination Engineering
Which of the following correctly expresses the relationship between utilization factor (UF), total lumens emitted (Φ), and useful lumens on the working plane (Φu)?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1UF = ΦΦu
- 2UF = Φ × Φu
- 3UF = Φu × Φ
- 4UF = ΦuΦ✓
Correct answer
UF = ΦuΦ
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